公开(公告)号：WO1988007400A1

公开(公告)日：1988-10-06

申请号：PCT/US1988001008

申请日：1988-03-23

Applicant: CERAMICS PROCESS SYSTEMS CORPORATION

Inventor： CERAMICS PROCESS SYSTEMS CORPORATION ,  NOVICH, Bruce, E. ,  POBER, Richard, L.

IPC: B01D21/26

CPC classification number: C02F1/52 ,  B03B5/00 ,  B03B9/00 ,  C02F1/385

Abstract: Colloidal particles can be separated from suspension (13) using a centrifuge which includes a static fluid volume (44) formed prior to introduction of the feed slurry (13). A more precise and accurate classification fraction is obtained thereby. A classification system, including a number of such centrifuges (233, 236, 237, 238) cascaded together, provides the ability to obtain numerous submicron classification fractions where the feed is a well-dispersed slurry of colloidal particles and the flow rate and rotation speed in and through each of the centrifuge units is controlled in real time. Such submicron classification fractions often exhibit dilatant rheology and, therefore, are very difficult to remove from the centrifuge bowl. The present invention provides a method for facilitating the removal of such dilatant cakes by the use of an excess amount of dispersant which is effective to disperse the colloids and to provide a plastic, rather than a dilatant, cake, while also having little effect on the dispersion rheology.

Abstract translation: 可以使用包括在引入进料浆料（13）之前形成的静态流体体积（44）的离心机将胶体颗粒与悬浮液（13）分离。 从而获得更准确和准确的分级分数。 分级系统，包括多个级联在一起的离心机（233,236,237,238），提供了获得许多亚微米分级分数的能力，其中进料是胶体颗粒的分散良好的浆料，流速和转速 通过每个离心机单元进行实时控制。 这种亚微米分级级分通常表现出膨胀的流变性，因此非常难以从离心机碗中去除。 本发明提供了一种通过使用过量的分散剂来促进这种膨胀蛋糕的去除的方法，该分散剂有效地分散胶体并提供塑料而不是膨胀的蛋糕，同时对 分散流变学。